Chapter 2 Section 2 Part II

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Presentation transcript:

Chapter 2 Section 2 Part II Algebra 2 Notes January 13, 2009

Warm-Ups {(-3.5, 5), (0, -2), (0, 4), (1, -2)} Create a mapping of the following relation. Determine whether or not it is a function: {(-3.5, 5), (0, -2), (0, 4), (1, -2)} Find the slope of the intercepts of the following line: Find the slope of the line graphed to the right:

Quick Review Point-Slope Form Standard Form: Slope-Intercept Form:

Writing an Equation Write in standard form an equation of the line with the slope through the point (8, -1)

Try One! Write in standard form the equation of a line with slope 2 which runs through the point (4, -2)

Writing an Equation Write in point-slope form the equation of the line through the points (1, 5) and (4, -1) Write in point-slope form the equation of the line through the points (5, 0) and (-3, 2)

Special Properties of Lines Page 66 Horizontal Line Vertical Line Slope is Zero Slope is Undefined

Special Properties of Lines Continued Perpendicular Lines Parallel Lines Slope: Opposite Reciprocals of each other Same Slope Different y-intercepts

Write an Equation Write an equation of the line through the point (0, 4) and perpendicular to the line:

Try One! Write an equation of the line through the point (5, -3) and perpendicular to the line:

Piecewise Activity Page 71 A piecewise function has different rules for different parts of it’s domain. The different “pieces” of the graph each has its own function Reminder: What’s a domain? In a group, do #3, 4, and 5

Homework #5 Pg 68 #20, 24, 26, 30, 38, 39, 43, 45, 48, 51, 57, 60